该方法简单，线性好，使用的试剂毒性小且廉价易得，不需特殊精密检测仪器，适用于基层单位。

The method has advantages of simple operation, good linearity, cheaper reagents with little toxic, and it does not need the special precision instrument. The method is suitable for basic level unit.

youdao

该方法简单，线性好，使用的试剂毒性小且廉价易得，不需特殊精密检测仪器，适用于基层单位。

The method has advantages of simple operation, good linearity, cheaper reagents with little toxic, and it does not need the special precision instrument. The method is suitable for basic level unit.

youdao